Carbureter.



P. H. BERGER. cmsuimfmz.- A A-PPLIOATIGN FILED APR. '14, 1906.

900,093, v Y Patented 0ct.",1908.0v

. y www. w l l .I i n Frank IELHe'tger ,if 4 By T all 'whom it may concern:

f FRANK H. HEITGER, or INDIANAPOLIS, INDIANA.

CARB'URETEB.

i Specification of Letters Ilatent.

Patented Oct. 6, 1908.

Applicationined April 14, -1905. i 'serial No. 255,586. e

Be it knownfthat I, FRANK citizen of the United States, residing at Indianapolis, inthe countyof Marion and,- State of Indiana, have invented certain new and useful Improvements in Carbureters, of which the following is a specification.

My invention relates to improvements in apparatus' for carbureting air withhydrocarbon vapor or gas andhas special reference to improvements in carbureters of the `class used for' supplyingcarbureted air to gas or gasolene'engines.

In' the operation of carbureters l for the production of carbureted air for gas engines,

-diliiculty is .experienced in securing and maintaining substantial uniformity of car burization, for 'the reason thatan engine operatingat dierent speeds produces a varying vacuum in the carburetor and thereby tends to change the proportions of air .and hydro-carbon liquidthe'rein.

The object .of/my invention'is to overcome the diliiculties vcommonly experienced with .carbureters, by" providing a carbureter of such construction that the composition of the mixture lproduced therein shall be substantially constant at all speeds of the-engine;

A further object of the invention is to provide a carbureter ,of great simplicity and minimum cost. l.

Other objects of the invention will appear hereinafter.

My invention is embodied, primarily, in a.

carbureter which comprises a mixing chamber having an air inlet at its 'bottom and a :l mixture outlet at ,its top, in combination with a valve for automatically controlling thead'mission. of air at said inlet, said valve being arrangpd to open inwardly, a spring.

resisting suc movement of the valve, means for adjustin said spring,- a suitable reservoir, a liqui Y nozzle -connectedthcrewith and risingthrough said valve to a point above the same.

More specifically defined my invention' consists in a carburcter which comprises a vertical mixing chamber havin an air inletat its bottom and a mixture out et at its top, incombination with a valve for` automatic- 'ally controllingthe admission of air at said linlet said valve being arranged to open inwardly, a spring resisting such movement of the valve, means fo'r adJusting said spring,

the upper part of said valve being or forming a vapor tube, anda suitably supplied H. HEITGER, a

fuel nozzle rising within the valve, to a point above the same and opening within the tubular part of said valve; and further, my invention consists in a carbureter of the foregoing construction, having a rotary Y vthrottle-valve in rits upper .pai-t, combined with thefmeans for adjusting said' spring; and further, the invention consists in variousdetails of'construc'tion and in combination of parts all as hereinafter described and particularly pointed out in the claims.

The inventlon will more readily understood by reference lto the accompanying drawings, forming a part of this specification, and in which Figure 1 is a vertical' section ofa carbuvreter embodying1 my invention; and Fig.' 2

is a plan View t ereof.

Referring to the drawings, 10 and 19 are two liquid reservoirs one larger than the other. These. reservoirs are preferably made in the saine casting,`and are connected by. an integral duct, 18. The top of the reservoir10, is capped, and said reservoir contains a oat, 13, for operating a liquid supply valve, A12, in the reservoir duct, 11.

`The reservoir cap contains an opening to guide the` valve stem and serving also t0 admit .air above the liquid. Likewise the reservoir, 19 contains a plug, 20, provided with an air opening, 21. Rising from the i liquid duct, 18, at a point midway Abetween the centers of the reservoirs is a liquid nozzle, 22. The nozzle, as shown, is threaded in the top of the duct, 18, and may be removed therefrom without disturbing any other part "of the carbureter. This nozzle extends some- `what above the normal level of theliquid in the reservoir. Obviously the column height in the nozzle is kept constant by the action of the oat valve, except when said column is raised by atmospheric pressure in the reservoirs. 'My purpose in placing the nozzle midway of the centers of the communicating columns of liquid in the two reservoirs is to prevent material variation in the heightof the liquid inthe nozzle when the carbureter is tilted or inclined, as frequently occurs when same is used on an automobile. The

`mixing chamber portion of my carbureter is preferably an integral part of the metal casting as here represented. The bottom of this portion is some distance above the duct,- 18, and its top rises to a point considerably above the reservoirs.` vThe mixing chamber,

14, `is concentric with the nozzle, 22. It-is enlarged at the bottom and contains an air inlet opening, 15. This opening is occupied by a valve, 23, which operates to restrict the flow of `air through said opening, 15, and thereby retain a portion of the vacuum in the chamber, 14, when the latter is placed under suction from the engine. The upper part of the,valve, 23, is of reduced diameter and is hollow, forming a vapor tube, 23, concentric with the nozzle and somewhat higher. The upper end of the tube contains a number ofv openings so that a portion of the air may pass through the tube. The upper end of the chamber, 14, is closed by a cap or plug,

sol

the drawings, the valve has an' upright stem 28; beneath this in the side of the'chamber is a mixture outlet, 16, communicating with the pipe, 17, which leads to the inlet valve of the engine (not shown). For throttling the outlet, 16, I employ a sleeve-like throttle valve, 25, itting the upper part of the mixing chamber, 14 and provided with an opening, 26, corresponding to the outlet opening.

The sleeve has a central stem, 27, which extends through the to or cap, 28, and to this I attacha lever, 29 or turning the throttle valve to regulate the throttle opening.

31 is a spring which presses upon the upper end' of the air valve, and 30 is a threaded follower arranged in the stem, 27, of the throttle valve, and fastened byeJ locking nut 33. The resistance of the valve, 23, to the` entrance of air, may be accurately adjusted by means of the follower, 30.v As shown in 7 32, formed on or attached to `the to of the vapor tube, 23, and slidabfle in the ollower, 30, the valve being thereby held centrally over the inlet opening. During the operation of the engine and at each suction stroke thereof, air rushes into the mixing chamber, the valve, 23, being elevated in proportion to the vacuum in the chamber, 14. As explained, part of the air passes upward within the valveY around the liquid nozzle, 22, Vaporizing and carrying off the liquid drawn from the latter. It will be observed that the vaporv thus formed within the tube, 235, passes into the mixing chamber, 14, in the form of a large number of small streams or jets, in which form it most readily admixes with the main currents of air from the lower part of the mixing chamber. As explained, the air valve is capable of any desired adjustment by means of the spring and follower, hence a mixture of any desired quality may be secured; and as the air valve proportions the admission of air to the vacuum in the chamber and to the movement of air past the nozzle, it follows that once the valve is adjusted, the composition of the mixture will remain constant, notwitli'stand* ing thei'varying demands of the engine for greater or less volumes of said mixture.

As various modifications of my invention will readily suggest themselves to one skilled in the art, I do not confine the same to the specific constructions- `herein shown and described'.

Having thus described my invention, I claim as new and desire to secure by Letters Patent: t

1. In a device of the class described, a mixing chamber having an air inlet at its bottom and a mixture outlet at its top, in combination with a valve in said chamber and seated about the inlet opening therein, for automatically controlling the admission of air at said inlet, a spring resisting the movement of the valve, means for adjusting said spring, a vapor tube formed on said valve, a nozzle of less diameter than said tube and rising therein to a point above said valve, and a 'suitable lreservoir wherewith said nozzle is connected, substantially as described.

2. lIn a device of the class described, two connected reservoirs, in combination with a supply duet, a suitable iioat valve, a nozzle supplied from said reservoirs and rising between the same at a point midway of their centers, and a mixing chamber arranged between said reservoirs to receive liquid from said nozzle, said chamber-having suitable inlet and outlet openings, substantially as described.

3. In a devicel of the class described, a mixin chamber having an air inlet opening in its 2bottom and provided with a mixture outlet in its side, in combination with a rotary throttle providedin the upper part of said chamber, an air valve arranged at the said inlet opening and vertially movable, a

'vaportube formed on said lvalve and opening into said chamber, afsuitable nozzle within said tube, an adjustable follower in the top of said throttle valve, and a spring interposed between said follower and said air valve, substantially as described.

4. In a device of the class described, a mixing chamber, having an air inlet in its bottom and an outlet in its side, in combination with a rotary throttle in the upper part of said chamber `and operable from the top of said chamber, a combined air valve and mixing vapor tube in the lower part of said chamber, said tube being superimposed on -said valve, 'a valve spring, a spring follower adjustable in the top of. said throttle, a valve stem guided .by and slidable in said follower, and a suitable liquid nozzle of less diameter than said tube and rising to a point above said valve, substantially as described.

5. In a device of the class described, a mixing chamber having an inlet at its bottom and an outlet at its top, in combination with an airvalve for closing said inlet, a vapor tube rising from said air valve and containing a plurality of vapor perforatious, means for adjusting Vthe action of said valve and a liquid nozzle rising through said valve and tube to a point'.l adjacent to the perforation I in i'he later. Substantially as described.

4(3. ln a device of the elaSs described, a mixing' chamber having an inlet atits boil'oni and an outlet at its` top, in combination with an 'air valve for closing said inlet. a vapor tube. rising from said air 'alve. a serva' plug threaded through the top of said 'haniber, a `spring interposed between said plug Y and said vapor JLube` and a stem on laid vapor tube extendingr through said plug: substantially as described.

T. In a. device ol the clasedescribed, a mixing` chamber having an inlet at its bottoni and an outlet at. its top, in combination with a fluid nozzleextending into said chamber, a relatively movable vapor tube arranged concentrirfally about Said nozzle, and a valve formed upon the bottom of said vapor tube, and adapted to close said inlet opening; subrantiallY as described. i

In witness whereof, I, have hereunto set my hand and seal at Indianapolis, Indiana, this 4th* day of April7 A. D. one thousand nine hundred and five.

FRANK H. IIEITGER. p.. 5.] Titnessies ART11U'1:1\I. Hoon, 4 J AMES A. VALSII. 

